Dome Drive kit, Pololu

DOME DRIVE KIT, POLOLU
 Black Anodized Aluminum Bracket, Dual sealed Ball Bearings
 Black Anodized Main Dome Drive Wheel with thick 1/4" O-ring
 Aluminum Adapter for Drive Wheel
 Hardware, included, plus Metric M3 Screws to mount a Pololu Motor (not Included)
  Pololu item #: 4742.... 30 to 1 ratio .... 12 Volt